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libration [laɪ'breɪʃ(ə)n] n
gen. 振〔摆〕动; 平衡〔均〕
avia. 天平动
space 天平动 (重力梯度稳定卫星受扰动时产生的摆动，尤指月球天平动); 振动; 摆动; 平衡
libration: 37 phrases in 3 subjects
Aviation10
Space13
Technology14

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